"I believe in striving to raise the human race to the highest plane of social organization, of cooperative work and of effective endeavor.""I believe that I am the trustee of the germ plasm that I carry; that this has been passed on to me through thousands of generations before me; and that I betray the trust if (that germ plasm being good) I so act as to jeopardize it, with its excellent possibilities, or, from motives of personal convenience, to unduly limit offspring." "I believe that, having made our choice in marriage carefully, we, the married pair, should seek to have 4 to 6 children in order that our carefully selected germ plasm shall be reproduced in adequate degree and that this preferred stock shall not be swamped by that less carefully selected." "I believe in such a selection of immigrants as shall not tend to adulterate our national germ plasm with socially unfit traits." "I believe in repressing my instincts when to follow them would injure the next generation."